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Add method to determine whether dependencies exist between model parameters

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This commit is contained in:
Nyall Dawson 2017-07-03 10:50:35 +10:00
parent 6483984d0b
commit 921939e4ec
4 changed files with 42 additions and 0 deletions
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10
python/core/processing/qgsprocessingmodelalgorithm.sip
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@ -724,6 +724,16 @@ Copies are protected to avoid slicing
%Docstring
Returns true if any child algorithms depend on the model parameter
with the specified ``name``.
.. seealso:: otherParametersDependOnParameter()
:rtype: bool
%End
bool otherParametersDependOnParameter( const QString &name ) const;
%Docstring
Returns true if any other model parameters depend on the parameter
with the specified ``name`` (e.g. field parameters where ``name``
is the parent layer parameter).
.. seealso:: childAlgorithmsDependOnParameter()
:rtype: bool
%End

13
src/core/processing/qgsprocessingmodelalgorithm.cpp
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@ -949,6 +949,19 @@ bool QgsProcessingModelAlgorithm::childAlgorithmsDependOnParameter( const QStrin
return false;
}
bool QgsProcessingModelAlgorithm::otherParametersDependOnParameter( const QString &name ) const
{
Q_FOREACH ( const QgsProcessingParameterDefinition *def, mParameters )
{
if ( def->name() == name )
continue;
if ( def->dependsOnOtherParameters().contains( name ) )
return true;
}
return false;
}
QMap<QString, QgsProcessingModelAlgorithm::ModelParameter> QgsProcessingModelAlgorithm::parameterComponents() const
{
return mParameterComponents;

9
src/core/processing/qgsprocessingmodelalgorithm.h
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@ -718,9 +718,18 @@ class CORE_EXPORT QgsProcessingModelAlgorithm : public QgsProcessingAlgorithm
/**
* Returns true if any child algorithms depend on the model parameter
* with the specified \a name.
* \see otherParametersDependOnParameter()
*/
bool childAlgorithmsDependOnParameter( const QString &name ) const;
/**
* Returns true if any other model parameters depend on the parameter
* with the specified \a name (e.g. field parameters where \a name
* is the parent layer parameter).
* \see childAlgorithmsDependOnParameter()
*/
bool otherParametersDependOnParameter( const QString &name ) const;
/**
* Returns the map of parameter components used by the model. The keys
* should match the algorithm's parameter names (see parameterDefinitions() ).

10
tests/src/core/testqgsprocessing.cpp
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@ -4458,6 +4458,16 @@ void TestQgsProcessing::modelerAlgorithm()
alg4.setChildAlgorithm( c10 );
QVERIFY( alg4.childAlgorithmsDependOnParameter( "p1" ) );
QgsProcessingModelAlgorithm::ModelParameter vlP;
alg4.addModelParameter( new QgsProcessingParameterVectorLayer( "layer" ), vlP );
QgsProcessingModelAlgorithm::ModelParameter field;
alg4.addModelParameter( new QgsProcessingParameterField( "field", QString(), QVariant(), QStringLiteral( "layer" ) ), field );
QVERIFY( !alg4.otherParametersDependOnParameter( "p1" ) );
QVERIFY( !alg4.otherParametersDependOnParameter( "field" ) );
QVERIFY( alg4.otherParametersDependOnParameter( "layer" ) );
// to/from XML